small spring-wound timer switch for bath fan

I am looking for a spring-wound (non electronic) timer switch for residential exhaust fans. The trouble is that the box is the size that typically has 2 switches side-by-side or 4 standard (120V) outlets. This box has 4 of the smaller-type switches. Please don't suggest that I install a larger or another box. It is in a tiled bath and I don't have the skills or time to attack that. If I can't fid a way to do it in the existing box, it stays a simple switch. No neutral in the box.

Box fill is something that I am aware of as a concept only. My understanding is that it is not dependent on, in this case, the switches that are used, only the cable or wire connections in the box. Please tell me if I am wrong. I also understand that even if box fill is not exceeded, I might still not be able to fit what I might want into a particular box.

If I am correct, in my case if the electrician that did the current installation did his job, I can change switches with abandon, as long as they fit.

The Intermatic comes with a plate which fits the decora style plates or you could use it without the plate for toggle style plates. The switch is the decora style. Personally I think it looks better in a decora style plate so for this application you would need a double decora switch plate but that is up to you.

Thanks, very much. I obviously remembered wrong about the fill. The yoke size is used in calculations but not the size of the switch itself. I knew that there was some disconnect between the ability to squeeze in a device and the box fill.